It would have been perfectly natural for the prehistoric potters to have desired to placate the presiding divinity, not so much perhaps out of gratitude for the clay as to avert his displeasure and fend off bad luck in baking pottery. It is well known that the best pottery of the Incas was extremely fine in texture. Students of ceramics are well aware of the uncertainty of the results of baking clay. Bad luck seems to come most unaccountably, even when the greatest pains are taken. Might it not have been possible that the people who were most concerned with creating pottery decided to erect this temple to insure success and get as much good luck as possible? Near the ancient temple is a small modern church with two towers. The churchyard appears to be a favorite place for baking pottery. Possibly the modern potters use the church to pray for success in their baking, just as the ancient potters used the great temple of Viracocha. The walls of the church are composed partly of adobe and partly of cut stones taken from the ruins. Not far away is a fairly recent though prehistoric lava flow. It occurs to me that possibly this flow destroyed some of the clay beds from which the ancient potters got their precious material. The temple may have been erected as a propitiatory offering to the god of volcanoes in the hope that the anger which had caused him to send the lava flow might be appeased. It may be that the Inca Viracocha, an unusually gifted ruler, was particularly interested in ceramics and was responsible for building the temple. If so, it would be natural for people who are devoted to ancestor worship to have here worshiped his memory. ------ FIGURE Route Map of the Peruvian Expedition of 1912 ------ CHAPTER VII The Valley of the Huatanay The valley of the Huatanay is one of many valleys tributary to the Urubamba. It differs from them in having more arable land located under climatic conditions favorable for the raising of the food crops of the ancient Peruvians. Containing an area estimated at less than 160 square miles, it was the heart of the greatest empire that South America has ever seen. It is still intensively cultivated, the home of a large percentage of the people of this part of Peru. The Huatanay itself sometimes meanders through the valley in a natural manner, but at other times is seen to be confined within carefully built stone walls constructed by prehistoric agriculturists anxious to save their fields from floods and erosion. The climate is temperate. Extreme cold is unknown. Water freezes in the lowlands during the dry winter season, in June and July, and frost may occur any night in the year above 13,000 feet, but in general the climate may be said to be neither warm nor cold.